Printing-plate holder



Aug. 14, 1928. 1,680,959

E. E. THIEL A PRINTING PLATE HOLDER Filed Aug. 22, 1924 bed.

Patented Aug. 14, 1928.

, UNITED STATES 'P ATENTfOFFlCE.

EMIL E. THIEL, OF CINCINNATI, OHIO, ASSIGNOR TO THE PRINTING MACHTNERY COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

PRINTING-PLATE Herman.

Application filed August '22, 1924. ,SerialNo. 733,643.

My invention relates to devices adapted for use wit-h a bed, for retaining printing plates and the like thereon. It further re lates more particularly to such devices where used with printing plate beds having numerous holes therein, into which the devices of my invention are dropped.

Drop-in hooks? as such devices are termed commercially, usually comprise a jaw, and a holder, the latter being adapted for dropping into the holes or channels in a printing platevbed, and some kind of means resulting in the operator being able to adjust the position of the parts so as to bring the jaw up against a printing plate thereby holding the plate down on the bed, and also holding it against displacement in the plane of the It is the object of my invention to provide a holder device which has few parts, is very simple to operate and hasgreat strength and smooth action. j

I accomplish my objects by that certain construction and arrangement of parts to be hereinafter more specifically pointed out and claimed. W i

In the drawing:

Figure 1 is a plan view of the device. Figure 2is a section on the line 22 of Figure 1 with the holder left in side elevation.

Figure 3 is a section taken through the holder alone, along the same line.

Figure 4 is a perspective view of the holder.

Figure 5 is a perspective view of the jaw.

I have indicated at 1, a portion of a printing plate bed, in which are holes 2 for reception of the plate holding elements. These holes 2 are forme'd at the underside with enlargements 3 forming shoulders for engage ment with hold-down lugs on the carrier portion of the holding elements. I

The carrier for my novel plate holder or I hook, is formed with a base 4, two upright sides 5, and a bearing block 6, the last named part being formed with a ball socket 7. The sides 5 are also formed with holes 8 for reception of a pivot pin 9 for the jaw.

Around the pivot pin a coiled spring 10 is arranged, with one end bearing against the "base, and the other end 10 bearing against the jaw stem.

The base is formed with a projection 11,

' beyond what may be termed the forward.

way it was put in. Since the uprights define the plane of action of the jaw, as will be observed from the drawings, thecarrier cannot' be removed when thejaw is in'hold down position with the printing plate since the abutment of the jaw with the printing plate will prevent the reverse tipping of the carrier. j

The jaw 12 has; a stem 13 one portion of which is at a slight angle with relation to the other. Thus the interspaced legs 13 of the stem extend in one direction, while the screw socket portion 13 extends in the other direction. The jaw and its stem are in this instance in one piece which is a saving in cost and extending down through the top of the jaw and its stem is a hole 14 extending into the screw socket, for reception ofa tool to revolve the screw. v v

. The screw 15 is an ordinary setscrew with a socket end, in the illustrated embodiment, except that it may have a squared hole 15 in its top for engagement with a square ended tool (not shown). The legs 13 are pierced with holes for reception of the pivot pin, and the end 10 of the spring bears against the body of the stem between the two legs.

A small ball 16 is set into the top of the bearing block and the end of the screw bears against this ball, giving a firm support to the lower end of the screw in any angular relation to the carrier-into which said screw may be brought during the operation of the 'device.

In assembling the device the stem is set into the carrier with the screw in place in the stem, and the pin set through the sides of the carrier, the legs of the stem, and the coiled spring. The ball is dropped into place, and the screw is held against the ball by means of the spring. It is not necessary, however, that the ball be free to revolve, and it may be made a tight enough fit into the socket in the top of the bearing block so that it will not drop out, unless dislodged with a tool.

The device is then ready for use, and may be tipped into a hole in the bed, adjacent the side of a printing plate, and proper tool inserted through the jaw to turn the screw.

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The action of turning the screw will be to tip the jaw to 21rd the plate, resulting in the jaw accomplishing its usual function. The application of force to the jaw through the screw element of its stem, tends to thrust the rear of the carrier lirmly against the wall of the bed hole, with a full fit of the base of the screw against the ball at all angles. Upon reversing of the screw the jaw is released and the carrier may be tipped outagain.

The carrier, jaw, stem, spring, ball and pivot pin, make up all of the parts, and the assembly is ver simple. The stem fits snugl v between the uprights of the carrier, prerating side motion, and no looseness ot the pivot pin in the legs of the stem will affect the tightness otengagen'lent of the jaw.

Having thus described my invention, what I claim as new and desire to secure by Lctters Patent,

l. A printing element holder comprising a 'arrier adapted to enter an oritice in a bed on which a. plate is to be mounted, a jaw, means for movablv sup arrtiug the jaw in the carrier, a screw available through the jaw for turning thereof, said screw threaded into the jaw, and an element at the end of said screw, providing a bearing for the adjustment of the screw with relation to the carrier, means for pivoting the jaw in the *arrier, the pivot point of the jaw being in a dill'crent angle from the hearing of the screw, and a spring to preserve the jaw in position with the screw thereof bearing against said bearing element.

2. A printing element holder comprising a carrier adapted to enter an orifice in a bed on which a plate is to be mounted, a jaw, means for movably supporting the jaw in the carrier, a screw available through the jaw for turning thereof, said screw threaded into the jaw and adapted to adjust: the position of the jaw and a bearing for said adjustment screw comprising a ball element and a sphere-concave surface on which said ball element bears.

3. A printing element holder comprising a carrier adapted to enter an orifice in a bed on which a plate is to be mounted, a jaw, means for movably supporting the jaw in the carrier, a screw available through the jaw for turning thereof, said screw threaded into the jaw and adapted to adjust the position of the jaw and a bearing element disposed in the carrier, against which element the lower end of the screw abuts, said bearing element and screw having convex and concave bearing surlaces respectively.

1'. A printing element holder comprising a carrie adapted to enter an orilice in a bed on which a plate is to be mounted, a jaw, means for movably supporting the jaw in the carrier, a screw available through the jaw for turning thereof, said screw threaded into the jaw, and adapted to adjust the position of the jaw, and a bearing element between the carrier and the screw, said bearing element and screw having a rounded bearing with each other, said screw having a socketed end and the hearing having a rounded face for engagement therewith.

5. A printing element holder comprising a carrier adapted to enter an orifice in a bed on which a plate is to be mounted, a jaw, means for movably supporting the jaw in the -arrier, a screw available through the jaw for turning thereof, said screw threaded into the jaw, and adapted to adjust the position of the jaw, a bearing element in the carrier COIDPIiSlUg a ball, a concave bearing element, and a concave face on said screw adapted to engage said ball.

EMIL E. TI-IIEL. 

